| http://www.w3.org/ns/prov#value | - It will be apparent that the well-known extreme resistance of polytetrafluoroethylene to all known solvents to high temperatures, and to virtually all known chemical agents, including strong acids such as hydrofluoric acid, hydrochloric acid, hydrobromic acid, hydroiodic acid, sulfuric acid, perchloric acid, strong alkalies such as sodium hydroxide, potassium hydroxide and the like, render possibl
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